Charles d



(No Model.)

0 D TISDALE AUTOMATIC ELEGTRIGFIRE ALARM.

Patented Sept. 10,1895.

\A/ITN'ESEES ANGIE EEIMM UNITED STATES PATENT ries,

CHARLES D. TISDALE, OF BOSTON, MASSACHUSETTS, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, OF TVVO-THIRDS TO JOHN D. GOULD, OF BROOK- LYN, AND CHARLES A. HANSON, OF N YORK, N. Y.

AUTOMATIC ELECTRIC FIRE-ALARM.

SPECIFICATION forming part of Letters Patent No. 546,262, dated September 10, 1895.

Application filed March 25 18 95. Serial No. 543,141. (No model.)

To all whom it may concern: O is a wire, which is made of metal, and one Be it known that I, CHARLES D. TISDALE, that will fuse at any desired heat. As shown, of Boston, in the county of Sufiolk and State this wireextends from a point D on the wall of Massachusetts, have invented certain new down and then along the mop-board at E, hav- 5 5 and useful Improvements in Automatic Elecing a return bend at a, and then runs along tric Fire-Alarms, of which the following is a the mopboard at F above its other portion E, full, clear, and exact description. thence upward at G and to the right at H and The object of the present invention is to upward to and is electrically connected with provide a simple, cheap, and efficient elecone pole of a magnet J secured to the wall. 6c n trical fire-alarm system for use more partic- This fusible wire, with the magnet, is in an ularly in apartment houses, dwellings, buildelectric circuit made by a wire K from the ings, the, although applicable as well to stores, terminal D with one pole of an electric bat- -warehouses, factories, 850.; and the invention tery L and from the other pole of the battery consists, in combination with a room or other by a wire M with the electromagnet J, which 65 apartment or place or building, 00., of a wire makes the circuit complete through the fusimade of any suitable fusible material that his wire back to the front D, closing the same, will fuse at the desired degree of heat, which which attracts the armature N and moves it is located and run around a room or building, toward itself, but to rest and bear upon an the, as desired, an electric circuit, and a insulated block P, which is located so the ar- 7o sounding device all constructed and arranged mature will be just free of and not touch the for operation substantially as hereinafter demagnet. scribed; and the invention also consists in Another electric circuit is made as follows: combination with a room or other apartment From the battery a wire Z) runs to and conor place or building, &c., of a wire made of meats with an electromotor Q, from thence a 2 5 anysuitable fusible material that will fuse at wire (1 connects with a bell R, and from the the desired degree of heat which is located bell another wire e connects with a block or and run around a room or building, 650., as terminal S. Another wire f connects at the desired, an electric circuit, an electric motor, point D of the fusible wire and runs from and an incandescent lamp, all constructed thence to and connects with the armature N. 30 and arranged for operation, all substantially T is an incandescent lamp, and its thumbas hereinafter fully described; and the invenpiece U has a crank-arm V attached to it, tion also consists in combination with a room which at its end is connected by a cord N or other apartment or place or building, &c., with the shaft Y of the electromotor, so that of a wire made of any suitable fusible mateif the motor is operated its shaft as it turns 5 rial that will fuse at the desired degree of Will wind upon it, the cord pulling down the heat, which is located and run around a room crank-arm V and cause the thumb-piece to or building, &G., as desired, an electric cirturn sufficiently to turn on the electric curcuit,a sounding device, an electric motor, and rent in connection therewith and light the incandescent lamp, all constructed and arlamp. 4c ranged for operation, substantially as herein- In practical use the fusible wire 0 can be after fully described, reference being bad to run round the room at any and all places dethe accompanying sheet of drawings,in which sired, along the mop-board, up at the sides, is illustrated the present invention. along the ceiling, cornices, &c., but should Figure 1 represents the side of a room with be of one continuous length, or at least so the 5 5 theinvention applied thereto. Fig.2 is adiaelectric current will flow through its whole gram representing the fusible wire extending length. around as if in a series of rooms or building The electric apparatus, the bell, and lamp and the manner of making the electric circan be placed in another room or in any part cuit. of the building, or the bell and lamp could too 50 In the drawings, A represents the side wall be placed outside of the building, as desired, of a room, and B its mop-board. but the electric wire should connect with the fusible wire, as at D, and thefusible wire with the magnet, or if themagnet was located in another room an electric wire could connect the two.

\Vith an electrical lire -alarm device arranged for operation as described and shown, if a fire occurs in any part of the room wherever the fusible wire is located, the wire at such place becomes heated and soon melts and runs down, breaking or separating at such place, breaking the electric circuit, demagnetizing the magnet, which releases the armature, when instantly the spring g, connected to the armature N, pulls it away from contact with the insulated point I over to and in con tact with the terminal S, which then makes the electric circuit through battery, motor, bell, and armature, as described. That instant the electric motor is operated which winds up the cord, and turning the thumbpiece it of the incandescent lamp it becomes lighted and the bell is caused to sound, giving an alarm by light and sound, which continues until some one comes to shut off the current or the battery runs down. The fusible wire can be of any size, preferably quite small, and it can be of a metal or compound to fuse at any desired or very low degree of heat. It can extend around the room, along the mop-board, in one of its moves, or at any desired place and height in the room along the sides of the room or in the corners, into closets, 850., and being small wire, as is evident, it can be laid easily and conveniently in most all places about the room or building, it being necessary, however, to keep the fusible wire electrically continuous and have its two ends connected with the electrical circuit to be complete at all times through the fusible wire, so that when the fusible wire is broken the electric circuit will be broken and the bell sounded, as described.

The bell and battery can be located in any place in or out of the building or outside of the room or on the outside of the building, and in some cases it might be well to have the electric lamp outside of the building, so that on the sounding of the bell calling attention to it any person on the street could quickly tell which building it was by the light, which in such cases should preferably have a red glass globe.

The great advantage of this system of electric fire-alarm is that the fusible wire can extend around the room or building indefinitely and into all places connected therewith, making what may be called a continuous fusible electric circuit, so that the instant a flame or extreme and dangerous heat touches or warms up any part of the continuous wire, it will melt it, and breaking or separating it at such place, break the electric circuit in connection therewith, which electric circuit is then made through the bell sounding the same, and if the motor and electric lamp are in the circuit causing the electric motor to turn on the electricity to light the-lamp, which continues to sound and the light to burn, respectively, until some one comes to look after the fire, the.

The bell or sounding device can be used alone without the electric lamp in a great many places; also the lamp can be used without the bell, and sometimes the two can be used in combination. This extensive use and arrangement of the fusible wire in a room or other place insures that an alarm will be given immediately at the start of the fire, and at all places in the room or building before it is spread or becomes dangerous or of any magnitude, as is obvious and is very important. As this fusible wire can be made at a very small cost it makes a very cheap device, and also being so cheap is very effectual in that plenty of the wire can be used at a small cost, and thus every place, corner, &c., in the room or building be protected by it.

Having thus described my invention, what I claim is 1. In an electric fire alarm, the combination with an electric motor, electric battery and electric magnet, of a continuous wire 0 of uniformly fusible material connected at one end to said magnet, a wire K connecting one end of said fusible wire to one pole of the battery, a wire M connecting said magnet with the other pole of the battery, a wire Z2 from the battery to the motor, a sounding device, a wire (Z connecting said sounding device to the motor, a terminal or block S, and a wire 9 running from said sounding device to said block, substantially as described. 4

2. In an electric fire alarm, the combination with an electric motor, electric battery and electric magnet, of a continuous wire 0 of uniformly fusible material connected at one end to said magnet, a wire K connecting one end of said fusible wire to one pole of the battery, a wire M connecting said magnet with the other pole of the battery, a wire 1) from the battery to the motor, a sounding device, a wire d connecting said sounding device to the motor, a terminal or block S, a wire a running from said sounding device to said block, an incandescent lamp provided with a crank arm V, and a cord W connecting said crank arm with the shaft Y of the motor, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

CHARLES D. TISDALE.

W'itnesses:

EDWIN XV. BROWN, F. WENrwoRTH.

IIO 

